LMS / Spotty error message / not working anymore

I am new to this forum and did see a thread about a similar issue but not the answer to it - hence reposting my problem. Spotty no longer works with my LMS. When I select Spotty in LMS or select squeezebox in Spotify the connection does no longer work and I get the error log as below? How can I fix this? I am using LMS 7.9.2 and Spotty is v3.1.3. Thanks for any hints!


[20-01-31 16:17:52.0067] Plugins::Spotty::API::Token::_killTokenHelper (164) Timed out waiting for a token
[20-01-31 16:18:01.0157] Slim::Networking::IO::Select::__ANON__ (131) Error: Select task failed calling Slim::Web::HTTP::processHTTP: Not a SCALAR reference at /volume1/@appstore/LmsRepack/Slim/Web/HTTP.pm line 1794.
; fh=Slim::Web::HTTP::ClientConn=GLOB(0xb2ef158)
[20-01-31 16:18:16.0129] Plugins::Spotty::API::Token::_killTokenHelper (164) Timed out waiting for a token
[20-01-31 16:18:50.6732] Plugins::Spotty::API::Token::_killTokenHelper (164) Timed out waiting for a token
[20-01-31 16:18:52.0063] Plugins::Spotty::API::Token::_killTokenHelper (164) Timed out waiting for a token
[20-01-31 16:19:16.0168] Slim::Networking::IO::Select::__ANON__ (131) Error: Select task failed calling Slim::Web::HTTP::processHTTP: Not a SCALAR reference at /volume1/@appstore/LmsRepack/Slim/Web/HTTP.pm line 1794.
; fh=Slim::Web::HTTP::ClientConn=GLOB(0xb2ef0b0)
[20-01-31 16:19:31.0136] Plugins::Spotty::API::Token::_killTokenHelper (164) Timed out waiting for a token