Based on Electrum's github page[1] and this forum[2], it looks you're first human experiencing this error.
The issue in the first link:
MemoryError: #7501 is the result of user(s) who submitted crash reports when experienced the same error;
so far, there are four who submitted (
3 users, maybe) and probably more who didn't send a crash report.
@Gryndal Have you tried the famous "
turn it off and on again"? (
your PC)