Can't send e-mail due to error with System.Web.UI.WebControls.Table

[nabsltd]

I seem to have everything configured correctly, but in Powershell 7 (7.5.4), I get the following error when trying to send a report:

Could not load type 'System.Web.UI.WebControls.Table' from assembly 'System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'.

Here's the run with debugging turned on:

PS C:\> Get-WindowsUpdate -MicrosoftUpdate -Verbose -ShowPreSearchCriteria -IgnoreRebootRequired:$true -IgnoreReboot -AcceptAll -Install -SendReport -Debug
DEBUG: 11/15/2025 12:57:03 PM CmdletStart: Get-WindowsUpdate
DEBUG: 11/15/2025 12:57:03 PM Test smtp settings
DEBUG: 11/15/2025 12:57:03 PM ParameterSetName: MicrosoftUpdate
DEBUG: 11/15/2025 12:57:03 PM Set pre search criteria: IsInstalled = 0
DEBUG: 11/15/2025 12:57:03 PM Set pre search criteria: IsHidden = 0
DEBUG: 11/15/2025 12:57:03 PM Set pre search criteria: RebootRequired = 0
DEBUG: 11/15/2025 12:57:03 PM Search criteria is: IsInstalled = 0 and IsHidden = 0 and RebootRequired = 0
PreSearchCriteria: IsInstalled = 0 and IsHidden = 0 and RebootRequired = 0
DEBUG: 11/15/2025 12:57:03 PM CLAYMORE: Connecting...
DEBUG: 11/15/2025 12:57:03 PM Module version: 2.2.1.5
DEBUG: 11/15/2025 12:57:03 PM Dll version: 2.2.1.5
DEBUG: 11/15/2025 12:57:03 PM UpdateSessionObj mode: Local
DEBUG: 11/15/2025 12:57:03 PM ServiceManagerObj mode: Local
DEBUG: 11/15/2025 12:57:03 PM Set source of updates to Microsof Update
DEBUG: 11/15/2025 12:57:03 PM Search for ServiceID. Set source of updates to Microsoft Update
VERBOSE: CLAYMORE (11/15/2025 12:57:03 PM): Connecting to Microsoft Update server. Please wait...
VERBOSE: Found [2] Updates in pre search criteria
DEBUG: 11/15/2025 12:57:25 PM Security Intelligence Update for Microsoft Defender Antivirus - KB2267602 (Version 1.441.246.0) - Current Channel (Broad)
DEBUG: 11/15/2025 12:57:25 PM Set post search criteria: RebootBehavior
DEBUG: 11/15/2025 12:57:25 PM Update was not filtered
DEBUG: 11/15/2025 12:57:25 PM Realtek - Net - 7/5/2017 12:00:00 AM - 10.19.705.2017
DEBUG: 11/15/2025 12:57:25 PM Set post search criteria: RebootBehavior
DEBUG: 11/15/2025 12:57:25 PM UpdateAccessFalse
VERBOSE: Found [1] Updates in post search criteria
DEBUG: 11/15/2025 12:57:25 PM Show update to accept: Security Intelligence Update for Microsoft Defender Antivirus - KB2267602 (Version 1.441.246.0) - Current Channel (Broad)
DEBUG: 11/15/2025 12:57:25 PM Accepted
VERBOSE: Choosed pre Search Criteria: (UpdateID = '5eb32f05-d8a5-4103-b4d4-77e125bcd929' and RevisionNumber = 200)

X ComputerName Result     KB          Size Title
- ------------ ------     --          ---- -----
1 CLAYMORE     Accepted   KB2267602    2GB Security Intelligence Update for Microsoft Defender Antivirus - KB2267602 (Version 1.441.246.0) - Current Channel (…
VERBOSE: Accepted [1] Updates ready to Download
DEBUG: 11/15/2025 12:57:25 PM Show update to download: Security Intelligence Update for Microsoft Defender Antivirus - KB2267602 (Version 1.441.246.0) - Current Channel (Broad)
DEBUG: 11/15/2025 12:57:27 PM Downloaded
2 CLAYMORE     Downloaded KB2267602    2GB Security Intelligence Update for Microsoft Defender Antivirus - KB2267602 (Version 1.441.246.0) - Current Channel (…
VERBOSE: Downloaded [1] Updates ready to Install
DEBUG: 11/15/2025 12:57:27 PM Show update to install: Security Intelligence Update for Microsoft Defender Antivirus - KB2267602 (Version 1.441.246.0) - Current Channel (Broad)
DEBUG: 11/15/2025 12:57:36 PM Installed
DEBUG: 11/15/2025 12:57:36 PM Reboot is required
3 CLAYMORE     Installed  KB2267602    2GB Security Intelligence Update for Microsoft Defender Antivirus - KB2267602 (Version 1.441.246.0) - Current Channel (…
VERBOSE: Installed [1] Updates
DEBUG: 11/15/2025 12:57:36 PM Return installed update list
DEBUG: 11/15/2025 12:57:36 PM Send report
Get-WindowsUpdate: Could not load type 'System.Web.UI.WebControls.Table' from assembly 'System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'.