TL;DR

• The issue with g.value.toLowerCase is not a function suggests a type mismatch, and checking the data type of g.value before calling toLowerCase() might resolve the issue.

Guidance

• Verify the data type of g.value to ensure it's a string before attempting to call toLowerCase() on it.
• Check if there are any recent changes in the data processing pipeline that could be causing g.value to be non-string.
• Inspect the input and output data of nodes to identify any patterns or inconsistencies that might be contributing to the error.
• Consider adding a type check or a default value for g.value to prevent the error from occurring.

Example

• A simple type check could be implemented as if (typeof g.value === 'string') { g.value = g.value.toLowerCase(); }.

Notes

• The root cause of the issue is unclear without more information about the data being processed, but the error message suggests a type mismatch.
• This solution assumes that g.value is expected to be a string, but this might not always be the case.

Recommendation

• Apply workaround: Add a type check for g.value before calling toLowerCase() to prevent the error from occurring, as the root cause is unclear and this will prevent the application from crashing.