appstream check fails

1/3 Validate desktop file          OK              0.02s
2/3 Validate schema file           OK              0.01s
3/3 Validate appstream file        FAIL            1.25s   exit status 1
>>> MALLOC_PERTURB_=252 /usr/bin/appstream-util validate data/io.github.qwersyk.Newelle.appdata.xml
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stdout:
data/io.github.qwersyk.Newelle.appdata.xml: FAILED:
• attribute-invalid     : <screenshot> height too large [https://raw.githubusercontent.com/qwersyk/Newelle/master/data/screenshots/screenshot1.png] maximum is 900px
• style-invalid         : <image> has vertical padding [https://raw.githubusercontent.com/qwersyk/Newelle/master/data/screenshots/screenshot1.png]
• style-invalid         : <image> has horizontal padding [https://raw.githubusercontent.com/qwersyk/Newelle/master/data/screenshots/screenshot1.png]
• style-invalid         : <caption> requires sentence case [chat page 1]
• attribute-invalid     : <screenshot> height too large [https://raw.githubusercontent.com/qwersyk/Newelle/master/data/screenshots/screenshot2.png] maximum is 900px
• style-invalid         : <image> has vertical padding [https://raw.githubusercontent.com/qwersyk/Newelle/master/data/screenshots/screenshot2.png]
• style-invalid         : <image> has horizontal padding [https://raw.githubusercontent.com/qwersyk/Newelle/master/data/screenshots/screenshot2.png]
• style-invalid         : <caption> requires sentence case [chat page 2]
• style-invalid         : <ul> cannot start a description [(null)]
• style-invalid         : Not enough <p> tags for a good description [0/1]
stderr:
Validation of files failed
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Summary of Failures:

3/3 Validate appstream file FAIL            1.25s   exit status 1

Ok:                 2   
Expected Fail:      0   
Fail:               1   
Unexpected Pass:    0   
Skipped:            0   
Timeout:            0   

Thank you very much for reporting the error, in future versions I will try to correct the error.

Still fails.

is this still an issue? i can try to merge the changes i made to it in nyarch assistant back to newelle