After the last update (Pi-hole Version v2.13.1 Web Interface Version v2.5.1) there is an option to disable the blocker for a custom amount of time. This simply does not work on my machine.
I click Disable, Custom time, enter the amount, click Submit, then nothing happen. If I click the Dashboard, I can see that the blocker is not disabled. If it were, I would be seeing an Enable item in the left hand side menu instead of Disable.
I did what you asked (but didn't upload the log), and ...
This seems ridiculous, but now it is working. It is the first time ever that it started working, and I am not sure why. I tried it many times before and it never worked. The other options (Disable -> For 5 minutes, etc.) did work correctly.
Anyway, I am glad it works now.
The only errors I saw in the console were
Refused to load the font 'data:font/woff;base64,d09GRgABAAAAAI3gABIAAAABRWQAAQABAAAAAAAAAAAAAAAAAAAAA…IwnaGGIYHBlUELLMKwH6htK8MUhmKGIAYjqCImVEUgs1mBOtm1gRYpuNZmSrgAALqcEVgAAAA=' because it violates the following Content Security Policy directive: "default-src 'self' https://api.github.com". Note that 'font-src' was not explicitly set, so 'default-src' is used as a fallback.