Right click the update and click Download. Then go to logs directory and check if you can get those two log files. Without those log files, troubleshooting is difficult.
found the dmpdownloader.log file and content is below.
Looking for OSReadinessworkspacename registry key...~~ $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.726+240><thread=4904 (0x1328)>
OSReadinessworkspacename registry key can't be found. Will retry in the next polling cycle~~ $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.726+240><thread=4904 (0x1328)>
OMS Upgrade Analytics are not enabled~~ $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.726+240><thread=4904 (0x1328)>
OMSUpgradeAnalyticsDownload finished~~ $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.726+240><thread=4904 (0x1328)>
OMSUA: Updating LastSyncedTime registry value $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.726+240><thread=4904 (0x1328)>
OMS Upgrade Analytics Download interval is: every 10080 minutes $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.726+240><thread=4904 (0x1328)>
Checking if dmpdownloader/UA has synced recently... $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.726+240><thread=4904 (0x1328)>
Sync is not necessary. $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.726+240><thread=4904 (0x1328)>
OMSUA: Last time user Requested to sync: Wed Dec 31 19:00:00 1969 $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.726+240><thread=4904 (0x1328)>
OMSUA: Last time dmpdownloader Synced:Wed May 06 13:10:08 2020 $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.726+240><thread=4904 (0x1328)>
OMSUA: Last poll time: Wed May 06 13:10:08 2020 $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.726+240><thread=4904 (0x1328)>
Registering registry key change for OMSUA ... $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.726+240><thread=4904 (0x1328)>
Calling OMSUpgradeAnalyticsDownload ... $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.726+240><thread=4904 (0x1328)>
OMSUA: Recently synced. SKIPPING. $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.726+240><thread=4904 (0x1328)>
Updating Upgrade Analytics Download interval... $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.726+240><thread=4904 (0x1328)>
OMS Upgrade Analytics Download interval is: every 10080 minutes $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.726+240><thread=4904 (0x1328)>
Checking if dmpdownloader/UA has synced recently... $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.726+240><thread=4904 (0x1328)>
Sync is not necessary. $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.726+240><thread=4904 (0x1328)>
OMSUA: Last time user Requested to sync: Wed Dec 31 19:00:00 1969 $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.726+240><thread=4904 (0x1328)>
OMSUA: Last time dmpdownloader Synced:Wed May 06 13:10:08 2020 $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.726+240><thread=4904 (0x1328)>
OMSUA: Last poll time: Wed May 06 13:10:08 2020 $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.726+240><thread=4904 (0x1328)>
Registering registry key change for OMSUA ... $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.726+240><thread=4904 (0x1328)>
Calling OMSUpgradeAnalyticsDownload ... $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.726+240><thread=4904 (0x1328)>
OMSUA: Recently synced. SKIPPING. $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.726+240><thread=4904 (0x1328)>
Updating Upgrade Analytics Download interval... $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.726+240><thread=4904 (0x1328)>
OMS Upgrade Analytics Download interval is: every 10080 minutes $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.726+240><thread=4904 (0x1328)>
Checking if dmpdownloader has synced recently... $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.726+240><thread=4896 (0x1320)>
Sync is not necessary. $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.757+240><thread=4896 (0x1320)>
Last time user Requested to sync: Wed May 06 11:51:58 2020 $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.757+240><thread=4896 (0x1320)>
Last time dmpdownloader Synced:Wed May 06 13:05:12 2020 $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.757+240><thread=4896 (0x1320)>
Last poll time: Wed May 06 13:10:08 2020 $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.757+240><thread=4896 (0x1320)>
Registering registry key change ... $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.757+240><thread=4896 (0x1320)>
Calling EasySetupDownload ... $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.757+240><thread=4896 (0x1320)>
Recently synced. SKIPPING. $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.757+240><thread=4896 (0x1320)>
Updating easysetup download interval... $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.757+240><thread=4896 (0x1320)>
Easy Setup Download interval is: every 1435 minutes $$<SMS_DMP_DOWNLOADER><05-06-2020 13:10:08.757+240><thread=4896 (0x1320)>
HasIntuneSubscription: Site has no Intune subscription.~~ $$<SMS_DMP_DOWNLOADER><05-06-2020 13:15:08.530+240><thread=4692 (0x1254)>
HasIntuneSubscription: Site has no Intune subscription.~~ $$<SMS_DMP_DOWNLOADER><05-06-2020 13:20:08.501+240><thread=4692 (0x1254)>
HasIntuneSubscription: Site has no Intune subscription.~~ $$<SMS_DMP_DOWNLOADER><05-06-2020 13:25:08.440+240><thread=4692 (0x1254)>
HasIntuneSubscription: Site has no Intune subscription.~~ $$<SMS_DMP_DOWNLOADER><05-06-2020 13:30:08.380+240><thread=4692 (0x1254)>
HasIntuneSubscription: Site has no Intune subscription.~~ $$<SMS_DMP_DOWNLOADER><05-06-2020 13:35:08.354+240><thread=4692 (0x1254)>
HasIntuneSubscription: Site has no Intune subscription.~~ $$<SMS_DMP_DOWNLOADER><05-06-2020 13:40:08.324+240><thread=4692 (0x1254)>
HasIntuneSubscription: Site has no Intune subscription.~~ $$<SMS_DMP_DOWNLOADER><05-06-2020 13:45:08.237+240><thread=4692 (0x1254)>