I believe there is a bug in line 6438 of the purecloud-platform-client-v2.min.js in the following chunk:

                    }, {
                        key: "log",
                        value: function log(level, statusCode, method, url, requestHeaders, responseHeaders, requestBody, responseBody) {
                            var content = this.formatLog(level, statusCode, method, url, requestHeaders, responseHeaders, requestBody, responseBody);
                            if (typeof window !== 'undefined') {
                                var shouldLog = this.calculateLogLevel(level);
                                if (shouldLog > 0 && this.log_to_console === true) {
                                    if (this.log_format === this.logFormatEnum.formats.JSON) {
                                        console.log(content);
                                    } else {
                                        console.log("".concat(level.toUpperCase(), ": ").concat(content));
                                    }
                                }
                            } else {
                                if (this.logger.transports.length > 0)
                                    this.log(level, content);
                            }
                        }

The this is already a Logger object and hence this.logger is undefined. The fix that works for me is

                                if (this.logger?.transports?.length > 0)

but it is probably not the way you'd like to fix the issue.