Use only characters from the 'syntactical character set'

What causes this issue?

Only characters from the syntactic character set are allowed in a
password. These are the digits from 0 to 9, the characters of the US
alphabet and various special characters which can be found on all
keyboards.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Choose another password.

Error message extract from SAP system. Copyright SAP SE.