Can't Save Score due to "Corruption with Time Signatures" (Marching Band

I am composing an original marching band show. I started the project in September. It is across 3 different scores (mvt 1, mvt 2, mvt 3&4 are combined). All scores were created in Musescore 3 and transferred to Musescore 4. Movement 1 and 3&4 are unable to save due to corruption errors, specifically with time signatures in the piccolo part. Movement 2 is completely fine for some reason.

Mvt 1 error message:
Incomplete measure: Full score, measure 75, staff 1. Found: 5/4. Expected: 4/4.
Incomplete measure: Part score: Piccolo, measure 35, staff 1. Found: 7/4. Expected: 4/4.
Incomplete measure: Part score: Piccolo, measure 42, staff 1. Found: 8/8. Expected: 6/8.
Incomplete measure: Part score: Piccolo, measure 45, staff 1. Found: 10/8. Expected: 6/8.
Incomplete measure: Part score: Piccolo, measure 74, staff 1. Found: 3/2. Expected: 4/4.
Incomplete measure: Part score: Piccolo, measure 75, staff 1. Found: 8/4. Expected: 4/4.
Incomplete measure: Part score: Piccolo, measure 76, staff 1. Found: 5/4. Expected: 4/4.

Mvt 3&4 error message:
Incomplete measure: Full score, measure 131, staff 1. Found: 8/8. Expected: 3/4.
Incomplete measure: Part score: Piccolo, measure 38, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Piccolo, measure 39, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Piccolo, measure 40, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Piccolo, measure 41, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Piccolo, measure 42, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Piccolo, measure 43, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Piccolo, measure 44, staff 1. Found: 2/4. Expected: 3/4.
Incomplete measure: Part score: Piccolo, measure 46, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Piccolo, measure 75, staff 1. Found: 0/1. Expected: 4/4.
Incomplete measure: Part score: Piccolo, measure 131, staff 1. Found: 13/8. Expected: 6/8.
Incomplete measure: Part score: Piccolo, measure 160, staff 1. Found: 3/2. Expected: 4/4.
Incomplete measure: Part score: Piccolo, measure 162, staff 1. Found: 5/4. Expected: 4/4.
Incomplete measure: Part score: Piccolo, measure 168, staff 1. Found: 5/4. Expected: 4/4.
Incomplete measure: Part score: Piccolo, measure 169, staff 1. Found: 5/4. Expected: 4/4.
Incomplete measure: Part score: Piccolo, measure 171, staff 1. Found: 5/4. Expected: 4/4.
Incomplete measure: Part score: Flute, measure 43, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: B♭ Clarinet 1, measure 43, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: B♭ Clarinet 2, measure 43, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Bass Clarinet, measure 43, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Alto Saxophone 1 1, measure 43, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Alto Saxophone 1 2, measure 43, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Tenor Saxophone, measure 43, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Baritone Saxophone, measure 43, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: B♭ Trumpet 1, measure 46, staff 1. Found: 5/4. Expected: 3/4.
Incomplete measure: Part score: B♭ Trumpet, measure 43, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Mellophone, measure 43, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Trombone, measure 43, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Baritone, measure 43, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Sousaphone, measure 43, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Chimes, measure 49, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Chimes, measure 50, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Timpani, measure 43, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Timpani, measure 45, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Auxiliary Percussion, measure 43, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Auxiliary Percussion, measure 45, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Snare Drum, measure 43, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Snare Drum, measure 45, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Tenor Drums, measure 43, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Tenor Drums, measure 45, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Bass Drums, measure 43, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Bass Drums, measure 45, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Cymbals, measure 43, staff 1. Found: 0/1. Expected: 3/4.
Incomplete measure: Part score: Cymbals, measure 45, staff 1. Found: 0/1. Expected: 3/4.

I panned over the scores to make sure there's no unusual time signatures or rests. There isn't. I have no idea what is going on.