Error Generating Events Map (Failed: an unknown error occurred while reading layer data)

Hi Everyone,
I am running DHIS2 v2.33.2 (tomcat 7)

I am receiving the error shown below when generating an events map:
image

Here’s the browser console error:

Failed to load resource: the server responded with a status of 500 (Internal Server Error)
app.js:13 API request failed with status 500 Internal Server Error
Request: GET …/api/33/analytics/events/query/uYjxkTbwRNf.json?dimension=ou:USER_ORGUNIT_GRANDCHILDREN;ADKbhlJ0Ikw&dimension=ovY6E8BSdto:IN:Positive&dimension=oindugucx72&filter=pe:THIS_YEAR&stage=dDHkBd3X8Ce&coordinatesOnly=true


0:0:0:0:0:0:0:1 - - [25/Mar/2020:01:01:13 +0100] “GET /dhis/api/33/programs?fields=id%2CdisplayName~rename(name)%2CtrackedEntityType%5Bid%2CdisplayName~rename(name)%5D&paging=false HTTP/1.1” 304 -
0:0:0:0:0:0:0:1 - - [25/Mar/2020:01:01:13 +0100] “GET /dhis/api/33/programStages/dDHkBd3X8Ce?fields=programStageDataElements%5BdataElement%5Bid%2CdisplayName~rename(name)%2CvalueType%2CoptionSet%5Bid%2CdisplayName~rename(name)%5D%2ClegendSet%5D%5D&paging=false HTTP/1.1” 304 -
0:0:0:0:0:0:0:1 - - [25/Mar/2020:01:01:13 +0100] “GET /dhis/api/33/programs/uYjxkTbwRNf?fields=programTrackedEntityAttributes%5BtrackedEntityAttribute%5Bid%2CdisplayName~rename(name)%2CvalueType%2CoptionSet%5Bid%2CdisplayName~rename(name)%5D%2ClegendSet%5D%5D&paging=false HTTP/1.1” 304 -
0:0:0:0:0:0:0:1 - - [25/Mar/2020:01:01:14 +0100] “GET /dhis/api/33/programs/uYjxkTbwRNf?fields=programTrackedEntityAttributes%5BtrackedEntityAttribute%5Bid%2CdisplayName~rename(name)%2CvalueType%2CoptionSet%5Bid%2CdisplayName~rename(name)%5D%2ClegendSet%5D%5D&paging=false HTTP/1.1” 304 -

Please advise, thanks.

John