If your Tumblr avatar won't change after you click save, there could be several reasons for this issue. Here are some troubleshooting steps you can follow to try and fix it:
Clear Browser Cache: Sometimes, cached data can cause display issues. Clear your browser's cache and cookies and then try uploading and saving your new avatar again.
Use a Different Browser: Try using a different web browser to see if the issue persists. Sometimes, certain browser settings or extensions can interfere with website functionalities.
Check File Format and Size: Ensure that the image you are trying to upload meets Tumblr's requirements. The supported file formats are JPG, PNG, and GIF. Also, check if the image size is within the allowable limits.
Resize the Image: If your image is too large, try resizing it to a smaller dimension before uploading it as your avatar.
Check Internet Connection: Ensure you have a stable internet connection. A slow or intermittent connection may prevent changes from being saved properly.
Disable Browser Extensions: Some browser extensions or add-ons might interfere with website features. Temporarily disable any extensions related to Tumblr or image processing and try again.
Try a Mobile App: If you are using the Tumblr website on a computer, try using the Tumblr mobile app on your phone or tablet to change your avatar.
Contact Tumblr Support: If the issue persists despite trying the above steps, it might be a technical problem on Tumblr's end. Contact Tumblr support or check their official blog or social media accounts for any known issues or updates.
Wait and Retry: Sometimes, server-related issues or maintenance might cause temporary glitches. If you've tried everything and nothing seems to work, wait for a while and then try changing your avatar again.
By following these steps, you should be able to troubleshoot and resolve the issue with your Tumblr avatar. If the problem persists, don't hesitate to reach out to Tumblr support for further assistance.