Can't import line protocol file with timestamp in influxDB UI

I am currently using InfluxDB version 2.7.1, and I am encountering an issue while attempting to import a line protocol file named lp.txt via the user interface (UI). Here is the content of the file:

myMeasurement,tag1=value1,tag2=value2 fieldKey="fieldValue" 1556813561098000000
myMeasurement,tag1=value2,tag2=value2 fieldKey="fieldValue2" 1556813561198000000

Interestingly, when I remove the timestamps, I can successfully import the file by simply dragging and dropping it into the UI. However, I encounter an error when I attempt to upload the file with timestamps. The error message I receive is as follows:

Failed to write data - invalid line protocol submitted

Although, I am able to manually enter same data with timestamps without any problems, therefore, it doesn’t appear to be a problem related to timestamps.