Help with Getting 2019 LTS Working

Recently downloaded Unity's new 2019 LTS, however, upon opening a project with this Unity version, there was an error and I had to run diagnostics. It said the following:
Unity Package Manager Diagnostics
Version 0.1.5

Starting diagnostics. Please do not close this window. This may take a few minutes...

✔ Making an HTTP request to the UPM package registry...
✔ Measuring the latency of the UPM package registry API...
✔ Measuring the latency of the UPM package download endpoint...
✔ Testing the Internet connection using the UPM package registry...
✔ Testing the Internet connection using Speedtest.net...
✔ Detecting whether proxy-related environment variables are set...
✖ Running the UPM health check...

The report is as follows:
Unity Package Manager Diagnostics (v0.1.5)
============
Ran 7 checks
============
6 succeeded
1 did not run
============
✅ UPM registry reachable (PASS)
Make an HTTP request to the UPM package registry
>> HTTP/1.1 200 OK
>> X-Powered-By: Express
>> Provider: Genesis
>> Date: Fri, 12 Jun 2020 02:49:35 GMT
>> Connection: close

✅ Ping UPM registry (PASS)
Measure the latency of the UPM package registry API
>> 16 pings made in 5.392 seconds
>> Average latency: 54.82 ms
>> Minimum latency: 45.36 ms
>> Maximum latency: 64.16 ms
>> Standard deviation: 5.17

✅ Ping UPM download (PASS)
Measure the latency of the UPM package download endpoint
>> 6 pings made in 5.213 seconds
>> Average latency: 147.72 ms
>> Minimum latency: 139.42 ms
>> Maximum latency: 154.69 ms
>> Standard deviation: 6.02

✅ UPM registry download speed (PASS)
Test the Internet connection using the UPM package registry
>> Measured speed to the UPM registry: 37.09 Megabits per second

✅ Speedtest.net (PASS)
Test the Internet connection using Speedtest.net
>> Measured speed to the Speedtest.net server: 33.21 Megabits per second

✅ HTTP proxy environment variables (PASS)
Detect whether proxy-related environment variables are set (HTTP_PROXY, HTTPS_PROXY, ALL_PROXY, NO_PROXY, UNITY_PROXYSERVER, UNITY_NOPROXY)
>> No proxy support has been configured through environment variables.

❓ UPM health check (UNKNOWN)
Start the UPM process and call its health endpoint
>> Could not find UPM executable at path '/Applications/Unity/Hub/Editor/2019.4.0f1/Unity.app/Contents/Resources/PackageManager/Server/UnityPackageManager'

 

I solved this issue by re-installing Unity 2019 LTS and it works now.