Error when redirecting

[SitecoreBill]

I'm seeing this error in UrlRewrite log. Please help, site needs to go live in 10 days.
Sitecore 9.1.1
installed update package for 9
Thanks in advance,
Bill

7332 15:15:04 ERROR UrlRewrite[web]::Exception occured
Exception: System.NullReferenceException
Message: Object reference not set to an instance of an object.
Source: Hi.UrlRewrite
at Hi.UrlRewrite.Processing.RewriteHelper.ReplaceBackReferences(Match match, String input, String backReferenceVariable) in C:\git\UrlRewrite\Hi.UrlRewrite\Processing\RewriteHelper.cs:line 30
at Hi.UrlRewrite.Processing.RewriteHelper.ReplaceConditionBackReferences(Match conditionMatch, String input) in C:\git\UrlRewrite\Hi.UrlRewrite\Processing\RewriteHelper.cs:line 19
at Hi.UrlRewrite.Processing.InboundRewriter.ProcessRedirectAction(InboundRule inboundRule, Uri uri, Match inboundRuleMatch, Match lastConditionMatch, InboundRuleResult ruleResult) in C:\git\UrlRewrite\Hi.UrlRewrite\Processing\InboundRewriter.cs:line 420
at Hi.UrlRewrite.Processing.InboundRewriter.ProcessRegularExpressionInboundRule(Uri originalUri, InboundRule inboundRule) in C:\git\UrlRewrite\Hi.UrlRewrite\Processing\InboundRewriter.cs:line 273
at Hi.UrlRewrite.Processing.InboundRewriter.ProcessInboundRule(Uri originalUri, InboundRule inboundRule) in C:\git\UrlRewrite\Hi.UrlRewrite\Processing\InboundRewriter.cs:line 207
at Hi.UrlRewrite.Processing.InboundRewriter.ProcessRequestUrl(Uri requestUri, List`1 inboundRules) in C:\git\UrlRewrite\Hi.UrlRewrite\Processing\InboundRewriter.cs:line 59
at Hi.UrlRewrite.Processing.InboundRewriteProcessor.ProcessUri(Uri requestUri, Database db, InboundRewriter urlRewriter) in C:\git\UrlRewrite\Hi.UrlRewrite\Processing\InboundRewriteProcessor.cs:line 76
at Hi.UrlRewrite.Processing.InboundRewriteProcessor.Process(HttpRequestArgs args) in C:\git\UrlRewrite\Hi.UrlRewrite\Processing\InboundRewriteProcessor.cs:line 36

[iamandycohen]

Email me at [email protected] and I can help you out tomorrow.

[SitecoreBill]

Thanks Andy, will do.

[SitecoreBill]

Sorry, got busy with a deployment. It was just files missing on CD servers. Configs and a folder in layouts. Actually there was one config that had to do with master db that caused a weird error that someone just happened to address, I just had to disable that one. Maybe I missed a step in instructions? All is good now thank you.