Package Manager Error

Every time I try to open Unity 2019 it comes up with a box that says "Package Manager Error".

the diagnostics told me to copy and paste these

[2020-05-15T16:47:27.695Z][INFO] Opened report file 'C:\ProgramData\Unity\UnityPackageManagerDiagnostics\diagnostic_report_15_05_2020_174725_66.txt'
[2020-05-15T16:47:27.696Z][INFO] Starting diagnostics
[2020-05-15T16:47:27.700Z][INFO][UpmRegistryReachable] Sending HEAD request to https://packages.unity.com
[2020-05-15T16:47:29.318Z][INFO][PingUpmRegistry] Starting ping test on 'http://packages.unity.com/com.unity.package-manager.metadata'
[2020-05-15T16:47:34.467Z][INFO][PingUpmDownload] Starting ping test on 'http://download.packages.unity.com/.../com.unity.package-manager.metadata-0.0.1.tgz'
[2020-05-15T16:47:39.534Z][INFO][UpmRegistryDownloadSpeed] Starting speed test with UPM registry
[2020-05-15T16:47:50.351Z][INFO][UpmRegistryDownloadSpeed] Download: 10.04 Megabits per second
[2020-05-15T16:47:50.353Z][INFO][Speedtest.Net] Starting speed test with Speedtest.net
[2020-05-15T16:48:03.718Z][INFO][Speedtest.Net] Download: 42.21 Megabits per second
[2020-05-15T16:48:03.718Z][INFO][Speedtest.Net] Upload: 9.76 Megabits per second
[2020-05-15T16:48:03.727Z][INFO][UpmHealthCheck] Starting health check
[2020-05-15T16:48:05.769Z][INFO] Finished diagnostics
[2020-05-15T16:48:05.769Z][INFO] Created report at 'C:\ProgramData\Unity\UnityPackageManagerDiagnostics\diagnostic_report_15_05_2020_174725_66.txt'

Unity Package Manager Diagnostics (v0.1.5)
============
Ran 7 checks
============
6 succeeded
1 failed
============
✅ 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, 15 May 2020 16:47:31 GMT
>> Connection: close

✅ Ping UPM registry (PASS)
Measure the latency of the UPM package registry API
>> 5 pings made in 5.118 seconds
>> Average latency: 141.45 ms
>> Minimum latency: 133.79 ms
>> Maximum latency: 153.65 ms
>> Standard deviation: 8.31

✅ Ping UPM download (PASS)
Measure the latency of the UPM package download endpoint
>> 5 pings made in 5.067 seconds
>> Average latency: 51.52 ms
>> Minimum latency: 39.45 ms
>> Maximum latency: 69.11 ms
>> Standard deviation: 10.88

✅ UPM registry download speed (PASS)
Test the Internet connection using the UPM package registry
>> Measured speed to the UPM registry: 10.04 Megabits per second

✅ Speedtest.net (PASS)
Test the Internet connection using Speedtest.net
>> Measured speed to the Speedtest.net server: 42.21 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)
>> Proxy support has been configured through the following environment variables:
>> UNITY_NOPROXY = localhost,127.0.0.1

❌ UPM health check (FAIL)
Start the UPM process and call its health endpoint
>> Server exited unexpectedly. Exit code: 101

 

Greetings!

I'd suggest going through the information in the pinned post here.