> For the complete documentation index, see [llms.txt](https://cqube.sunbird.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cqube.sunbird.org/cqube-v-4.1-beta/troubleshooting-issues/angular-and-node-issues.md).

# Angular & Node Issues

|                                                                                                 | **Where**                                     |                                           | **Why**                                                                        | **How to resolve**                                                                                       |
| ----------------------------------------------------------------------------------------------- | --------------------------------------------- | ----------------------------------------- | ------------------------------------------------------------------------------ | -------------------------------------------------------------------------------------------------------- |
| **Error message**                                                                               | **Error Location**                            | **Error type**                            | **Error identification (Cause)**                                               | **Probable resolution**                                                                                  |
| Internal error. Please try again!!                                                              | On Browser                                    | Exception                                 | Issue in data, key not found, or file not there in s3                          | <p>"1. Make sure the file is available in s3 or not<br> 2. Check the data format is correct or not."</p> |
| NoSuchKey: The specified key does not exist                                                     | /opt/cqube/logs/server\_side-error.log        | File not present exception                | If specified file is not present at its location                               | Make sure all file are available which we are used                                                       |
| Request failed with status code 401                                                             | On Browser                                    | Unauthorised user                         | When ever token expired, user will be unauthorised                             | User should refresh page and login with valid username and password                                      |
| Error: uncaughtException: ENOENT: no such file or directory                                     | /opt/cqube/logs/server\_side-error.log        | Local file is not there at given location | <p>The file which we are trying to read is <br>not present at its location</p> | We should put the required file at given location                                                        |
| Error: Request failed with status code 502                                                      | On Browser                                    | Bad gateway                               | If specified url is not accessible                                             | Restart the ngnix server or otherwise give sudo pm2 resurrect                                            |
| UncaughtException: The specified bucket does not exist                                          | /opt/cqube/logs/admin\_server\_side-error.log | S3 bucket not exist                       | The bucket which we are trying to access is not present                        | Create all the required buckets                                                                          |
| TypeError: Cannot read property 'toString' of undefined                                         | /opt/cqube/logs/server\_side-error.log        | Key unavailable                           | If specific key is not found                                                   | Make sure key is there in data, if not there put it as empty or null value                               |
| TypeError: districtData.map is not a function                                                   | /opt/cqube/logs/server\_side-error.log        | If file has no data                       | If file is there but data is null                                              | If data is not there don't create files                                                                  |
| NetworkingError: socket hang up                                                                 | /opt/cqube/logs/server\_side-error.log        | Network issue                             | If network is very weak or not connected                                       | Check you internet connection                                                                            |
| Error: Cannot find module 's3-append'/any                                                       | /opt/cqube/logs/server\_side-error.log        | Library not installed                     | If we are using some module that is not installed                              | Do npm install and rerun the server                                                                      |
| TypeError: Cannot read property 'keyname(any key)' of null/undefined                            | /opt/cqube/logs/server\_side-error.log        | Key unavailable                           | Trying to access a key which is null/undefined                                 | <p>Check the data,<br> if key not present put the key with null value in s3 files</p>                    |
| TypeError: districtsData.sort is not a function                                                 | /opt/cqube/logs/server\_side-error.log        | If file has no data                       | If file is there but data is null                                              | If data is not there don't create files                                                                  |
| RequestTimeTooSkewed: The difference between the request time and the current time is too large | /opt/cqube/logs/server\_side-error.log        | System time not correct                   | If syatem time is different from actual time                                   | Change your system time to actual time                                                                   |


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