I got "Server encountered an internal error" since 2 hours and I cannot send any task/job on batch.

Hi ajb cryptocapital,

Check the Azure Status page to see if there are any ongoing issues in your region that might be affecting the Batch service.

Verify that your Batch account has not exceeded its resource quotas. Internal errors can occur when service limits are hit. In the Azure portal, navigate to your Batch account, then go to Settings > Quotas, and review the core quota limits for your selected region.

If you're submitting jobs using the Azure SDKs or REST API, make sure your application implements retry logic with exponential backoff. This means retrying failed requests with progressively longer wait times, and capping the maximum number of retries to avoid endless loops.

check if the Azure portal displays any specific error codes or additional diagnostic messages related to the failed jobs or tasks.

For your information: Error codes in Batch

If you have any further queries, let me know. If the information is helpful, please click on Upvote and Accept Answer on it.