Result Set Alert not working

I have set up an alert on a result with an hourly schedule. I can see the records in the result however not receiving any alerts.

In the logs i see following error, unsure if its related.

[60d63760-9b9f-4201-82b6-0cdd25cf0bfb] 2023-03-15T22:30:03+05:30 ERROR metabase.task.send-pulses Error sending Pulse 41
at clojure.core$name.invokeStatic(core.clj:1610)
at clojure.core$name.invoke(core.clj:1604)

Below are the diagnostic info
"browser-info": {
"language": "en-GB",
"platform": "MacIntel",
"userAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/ Safari/537.36",
"vendor": "Google Inc."
"system-info": {
"file.encoding": "UTF-8",
"": "OpenJDK Runtime Environment",
"java.runtime.version": "11.0.18+10",
"java.vendor": "Eclipse Adoptium",
"java.vendor.url": "",
"java.version": "11.0.18",
"": "OpenJDK 64-Bit Server VM",
"java.vm.version": "11.0.18+10",
"": "Linux",
"os.version": "5.4.209-116.367.amzn2.x86_64",
"user.language": "en",
"user.timezone": "GMT"
"metabase-info": {
"databases": [
"hosting-env": "unknown",
"application-database": "postgres",
"application-database-details": {
"database": {
"name": "PostgreSQL",
"version": "11.17"
"jdbc-driver": {
"name": "PostgreSQL JDBC Driver",
"version": "42.5.0"
"run-mode": "prod",
"version": {
"date": "2023-02-19",
"tag": "v1.45.3",
"branch": "release-x.45.x",
"hash": "070f57b"
"settings": {
"report-timezone": null

Yup, that’s the error, can you send the chart and data types?