Maybe this will help you resolve the issue.
This error typically occurs when a cryptographic hash value (like for extensions, keys, or metadata) is malformed — it must be exactly 64 hex characters (32 bytes).
Common Cause:
A corrupt or invalid value in a config file (like navsettings.json or web.config), or
A bad extension package during migration to BC14.
What to Check:
1. Go to Event Viewer > Application Logs, find the full error message, and look for the source of the hash (e.g., file name or extension ID).
2. If you're using a custom extension or DLL, ensure its hash/signature is valid.
3. Open navsettings.json (or BC’s service tier config) and look for any custom config value related to a key or secret that may be incorrect.
You might need to remove or recompile the faulty extension, or review any recent changes before the service stopped.
Mark below checkbox to make this answer Verified if it helps you. Let me know if you can share the full error line from Event Viewer.
