I am new to DNN so here it goes.  I am using the Store Catalog Module to display a bunch of Products I entered.  When I originally entered the product I would get an error after clicking 'Add' but my product would be saved in the database so I continued.  After completeing that I then started to mess with the catalog settings.  After going back and forth between my home page and the catalog I would eventually get the following error:

Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached.

I then started looking around and found the event viewer.  There sat all my original errors (one for every product):

ExceptionGUID: 22796aec-5532-42a4-b45a-8580975b12e1
InnerException: Object reference not set to an instance of an object.
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: DotNetNuke.Modules.Store.WebControls.Catalog.Page_Load
StackTrace:
Message: DotNetNuke.Services.Exceptions.ModuleLoadException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object. at DotNetNuke.Modules.Store.WebControls.Catalog.Page_Load(Object sender, EventArgs e) --- End of inner exception stack trace ---
Source:
Server Name: CLE02WEB04

Would the products be causing my problem?  If I upload the Web.config file then it will start working again but as soons as I start accessing the catalog again it will eventually die.  Where do I go to find out what is causing this?

Thank you for any insight into this.  I realize I am probably not giving enough information but I don't know what I am looking for.  BTW - I am running 4.8.2 of DNN.

Chris