The profile.dat you downloaded is corrupted or made for a different game version. Delete it and restore your backup. Then only download files that specify "DLS 23 v1.0.5" or similar.
Search results indicate that these files are typically distributed via YouTube descriptions or third-party MOD APK sites. Popular variants include: Unlimited Coins/Gems : Files modified to show maximum currency. Legendary Squads dls 23 profile.dat file download