To resolve this, Open TIBCO Spotfire Analyst > Tools > Options > Document > Filters for in-memory data tables > select the radio button for "Create automatically for all columns" > Click "OK" and relaunch the Analyst to reflect the changes.
Below is the reference image:
Note: This setting specifies whether or not filters should be created automatically for the in-memory data tables. In-database data tables are always managed manually.
Note: The above option is applicable for calculated column(s) too.
Note: To add a filter for a specific column in the currently open analysis, open the "Data in Analysis" flyout, launched from the panel on the left side of the Analyst window > select the column of interest > click on the "Show Filter" icon > "Click to create a filter"