TensorBoard doesn't work on IOS/IpadOS. Requires apple icons.

[NikitaGordia]

After starting the server it gives the following result:

W0107 19:43:36.780149 139768956442176 application.py:556] path /apple-touch-icon-precomposed.png not found, sending 404
W0107 19:43:36.798506 139768956442176 application.py:556] path /apple-touch-icon.png not found, sending 404
W0107 19:43:36.832389 139768956442176 application.py:556] path /apple-touch-icon-precomposed.png not found, sending 404
W0107 19:43:36.849392 139768956442176 application.py:556] path /apple-touch-icon.png not found, sending 404
W0107 19:43:36.900132 139768956442176 application.py:556] path /apple-touch-icon-precomposed.png not found, sending 404
W0107 19:43:36.915132 139768956442176 application.py:556] path /apple-touch-icon.png not found, sending 404
W0107 19:43:36.948019 139768956442176 application.py:556] path /apple-touch-icon-precomposed.png not found, sending 404
W0107 19:43:36.965894 139768956442176 application.py:556] path /apple-touch-icon.png not found, sending 404

And in afterwards you can not access tensorboard on apple devices (tested on Iphone 8, iphone 11, ipad 2018). but on android/chome(macos) works great

[bmd3k]

My initial thought is that this could be the same problem as recently discovered in #5489.

Can you confirm which browser you are using on iOS?

Can you confirm which version of tensorboard you are using?

[NikitaGordia]

1. It doesn't work on every browser (chrome, safari) on iphone/ipad. Title of tensorboard on the top of the page is present but it's content is blank.
   However it works on chrome macos and It doesn't work on Safari macos.
   All devices have the latest update: macos 12.0.1 (21A559), iphone 15.1 (19B74)
2. The latest version:

tensorboard==2.7.0
tensorboard-data-server==0.6.1
tensorboard-plugin-wit==1.8.0

I doesn't look like the issue you have mentioned before:

[bmd3k]

Thanks for the additional details. I was able to reproduce the problem on a simulator and that it is fixed by #5495. It's the same root cause as #5489.

[NikitaGordia]

Thank you for your job! Hope to see learning curves of my deep neural networks on Safari :)