Corrupted Measure Confusion

See https://musescore.org/en/node/54721 for how to fix it.

Welcome aboard...

First off, looking at your score, the page size is too small to hold a complete system - i.e. the instruments at the bottom run off the page and can't be accessed for repair.
To view these corrupt staves, I made the page size longer. You may have to scale your score down if you wish to fit it on A4. See:
https://musescore.org/en/handbook/layout-and-formatting-0#layout-page-s…

also of interest:
https://musescore.org/en/node/54721
(as already mentioned)

Now, about your score...
Because MuseScore internally counts the pickup measure, the corruption actually appears in (nominal) measure 9 of your score. You will see half note rests intead of full measure rests.

To fix:
1. Select all the corrupt measures 9 of the bottom 4 staves, and then in menu item: Edit -> Voices, click Exchange Voice 1-2.
2. With all still selected, click Delete.

You can also change the A. Sax measure 8 to a whole measure rest by selecting the measure (not the rest) and clicking Delete.

See attachment - but be advised I lengthened the page size to accomodate all staves - so be careful if you need to print.

Regards.

I read the clarification that was suggested in a link in the explanation on fixing this. I just want to add that I had this corrupt-measure thing happen three or four times last week, and this was a new score I created in 2.0.2. I did not import from an older MuseScore or from an XML file.