The "Error Validating Basket" message is tied to Olo's platform. This error is indicative of misconfigured menu items. Meaning the configuration in Olo's dashboard does not match what is in the POS.
Identify the location in question and the menu items being ordered (including any modifiers) and create a case with Olo by emailing firstname.lastname@example.org.
If more information is needed around basket testing, please see Olo's article titled Basket Testing.
In an effort to supply information as quickly as possible, this article has been published prior to a formal technical review, and is subject to factual, grammatical, and various structural errors. Data may be incomplete, misordered, or incorrect.
This additional disclaimer will be removed upon formal review of this article. The standard Punchh Inc. KB Disclaimer still applies, and can be found at: https://support.punchh.com/hc/en-us/articles/360040100273-Punchh-Inc-Knowledge-Base-Disclaimer