Here is the log file with my user info removed. Everything worked fine a couple of days ago.

Code:
2023-01-20 11:24:15: USPS build: 2022-08-07 K11e

Server: production
Quote Request Rate Type: Retail
Quote from main_page: checkout_shipping
USPS Options (weight, time): --none--
USPS Domestic Transit Time Calculation Mode: NEW
Cart Weight: 1.63
Total Quote Weight: 1.63 Pounds: 1 Ounces: 11
Maximum: 100 Tare Rates: Small/Medium: 0:0 Large: 10:0
Handling method: Box Handling fee Domestic: $0.00 US Handling fee International: $0.00 US
Decimals: 2
Domestic Length: 8.625 Width: 5.375 Height: 1.625
International Length: 8.625 Width: 5.375 Height: 1.625
All Packages are Machinable: False
Enable USPS First-Class filter for US shipping: True
Sorts the returned quotes: Price-LowToHigh

ZipOrigination: 61015
ZipDestination: Postcode: 61015 Country: United States City: Chana State: Illinois
Order SubTotal: $125.00 US
Order Total: $125.00 US
Uninsurable Portion: $0.00 US
Insurable Value: $125.00 US

2023-01-20 11:24:15: Sending request to USPS

2023-01-20 11:24:15: ==================================

SENT TO USPS:

<RateV4Request USERID="XXXXXXXXXXXXX"><Revision>2</Revision>
</RateV4Request>


RESPONSE FROM USPS: 

==================================
CommErr (should be 0): 0 - 

==================================

USPS Country - $order->delivery[country][iso_code_2]: United States $this->usps_countries: US
Domestic Services Selected: 

2023-01-20 11:24:15: RESPONSE FROM USPS:
==================================
============

RAW XML FROM USPS:

SimpleXMLElement Object
(
    [Number] => -2147221202
    [Source] => Common:XmlParse
    [Description] => The element &#39;RateV4Request&#39; has incomplete content. List of possible elements expected: &#39;RateClientType, Package&#39;.
    [HelpFile] => SimpleXMLElement Object
        (
        )

    [HelpContext] => SimpleXMLElement Object
        (
        )

)