Add warnings and improve errors

[adrienball]

Description:

• Add some warning logs
• Raise proper error when attempting to load resources with bad requirements

Checklist:

• [x] My PR is ready for code review
• [x] I have added some tests, if applicable, and run the whole test suite, including linting tests
• [ ] I have updated the documentation, if applicable

[codecov-io]

Codecov Report

Merging #821 into develop will increase coverage by 0.12%. The diff coverage is 90%.

@@             Coverage Diff             @@
##           develop     #821      +/-   ##
===========================================
+ Coverage    88.53%   88.65%   +0.12%     
===========================================
  Files           76       76              
  Lines         4615     4620       +5     
  Branches       896      900       +4     
===========================================
+ Hits          4086     4096      +10     
+ Misses         394      390       -4     
+ Partials       135      134       -1