Sitecore 9.1 installation : Error starting xConnectIndexing server

i am constantly getting following exception when i execute the XP0-SingleDeveloper.ps1 installer script. Everything goes smoothly except when the script is trying to start the XConnect search indexer.

[--------------------------- XConnectXP0_StartServices [1] : ManageService -------------------------------------------]
[XConnectXP0_StartServices [1]]:[Updating] SC91.xconnect-IndexWorker
WARNING: Waiting for service 'Sitecore XConnect Search Indexer - SC91.xconnect-IndexWorker (SC91.xconnect-IndexWorker)'
to
WARNING: start...
WARNING: Waiting for service 'Sitecore XConnect Search Indexer - SC91.xconnect-IndexWorker (SC91.xconnect-IndexWorker)'
to
WARNING: start...
WARNING: Waiting for service 'Sitecore XConnect Search Indexer - SC91.xconnect-IndexWorker (SC91.xconnect-IndexWorker)'
to
WARNING: start...
Install-SitecoreConfiguration : Failed to start service 'Sitecore XConnect Search Indexer - SC91.xconnect-IndexWorker
(SC91.xconnect-IndexWorker)'.
At C:\sc91_install\9.1 Install\XP0-SingleDeveloper.ps1:74 char:1
+ Install-SitecoreConfiguration @singleDeveloperParams *>&1 | Tee-Objec ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Write-Error], WriteErrorException
+ FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,Install-SitecoreConfiguration

[TIME] 00:05:15
Start-Service : Failed to start service 'Sitecore XConnect Search Indexer - SC91.xconnect-IndexWorker
(SC91.xconnect-IndexWorker)'.
At C:\Program
Files\WindowsPowerShell\Modules\SitecoreInstallFramework\2.1.0\Public\Tasks\Invoke-ManageServiceTask.ps1:40 char:33
+ $instance | Start-Service
+ ~~~~~~~~~~~~~
+ CategoryInfo : OpenError: (System.ServiceProcess.ServiceController:ServiceController) [Start-Service],
ServiceCommandException
+ FullyQualifiedErrorId : StartServiceFailed,Microsoft.PowerShell.Commands.StartServiceCommand

 

Looking at the event log, there is some URLFormatException that i dont get it why.. 

my Solr URL is https://solr:8984/solr/#/ 

 

Application: XConnectSearchIndexer.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.UriFormatException
at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind)
at Sitecore.Xdb.Collection.Search.Solr.SolrCoreUri.ReplaceCoreName(String newCoreName)
at Sitecore.Xdb.Collection.Search.Solr.SolrWriterSettings..ctor(SolrCoreUri coreUri, Int32 maximumUpdateBatchSize, Int32 maximumDeleteBatchSize, Int32 maximumCommitMilliseconds, Int32 parallelizationDegree, Int32 retryCount, Int32 maximumRetryDelayMilliseconds, Encoding encoding, IndexerSettings indexerSettings)
at Sitecore.Xdb.Collection.Search.Solr.RebuildSolrWriterSettings..ctor(String rebuildCoreName, SolrWriterSettings solrWriterSettings, Uri rebuildCoreWriteUrl, Uri rebuildCoreCleanUri, Uri swapCoresUri, Uri coreAdminUrl, Uri rebuildCoreCommitUrl)
at Sitecore.Xdb.Collection.Search.Solr.RebuildSolrWriterSettings..ctor(SolrWriterSettings settings, String rebuildCoreName)
at Sitecore.Xdb.Collection.Search.Solr.SolrIndexRebuilder.GetRebuildSolrWriterSettings(SolrWriterSettings settings)
at Sitecore.Xdb.Collection.Search.Solr.SolrIndexRebuilder..ctor(SolrWriterSettings writerSettings, XdbModel xdbModel, IWebClientFactory httpClientFactory, IPercentileGenerator percentileGenerator)