Hi,
When I try to open the app recently, Google says my account is signed out, so I click on it and I receive an error saying that JavaScript is not enabled for this browser and I am unable to login:

Version: 1.5.10
OS: Ubuntu 20.04
Arch: x86_64
I'm having the same problem - recently changed my Google login and receiving the same screen.
Version 1.5.11
OS macOS 10.15.7
Ditto.
Version 1.5.11
macOS 10.15.6 x64
https://github.com/yakyak/yakyak/issues/1262
@partlyhuman found the solution of deleting %APPDATA%\yakyak (or ~/.config/yakyak on *nix)
Most helpful comment
https://github.com/yakyak/yakyak/issues/1262
@partlyhuman found the solution of deleting
%APPDATA%\yakyak(or~/.config/yakyakon *nix)