Handle provider errors on the abstract class

[bdmendes]

Closes #976

Review checklist

• Terms and conditions reflect the current change
• Contains enough appropriate tests
• If aimed at production, writes a new summary in whatsnew/whatsnew-pt-PT
• Properly adds an entry in changelog.md with the change
• If PR includes UI updates/additions, its description has screenshots
• Behavior is as expected
• Clean, well-structured code

[codecov]

Codecov Report

Merging #977 (9d145da) into master (e88317d) will increase coverage by 1%.
Report is 2 commits behind head on master.
The diff coverage is 20%.

Additional details and impacted files

@@          Coverage Diff          @@
##           master   #977   +/-   ##
=====================================
+ Coverage      22%    23%   +1%     
=====================================
  Files         143    143           
  Lines        4368   4346   -22     
=====================================
+ Hits          953    962    +9     
+ Misses       3415   3384   -31     

[LuisDuarte1]

It seems that the login succeeds but it won't redirect to the main page for some reason. Can you look at this?