diff --git a/documents/업무/4월/3째주/0417.txt b/documents/업무/4월/3째주/0417.txt
new file mode 100644
index 0000000..d9bae31
--- /dev/null
+++ b/documents/업무/4월/3째주/0417.txt
@@ -0,0 +1,7 @@
+ "Uncaught (in promise) Error: Could not instantiate: ProductRegistryImpl.Registry", source: devtools://devtools/bundled/shell.js (109)
+ "Uncaught (in promise) Error: Could not instantiate: ProductRegistryImpl.Registry", source: devtools://devtools/bundled/shell.js (109)
+ "Uncaught (in promise) Error: Could not instantiate: ProductRegistryImpl.Registry", source: devtools://devtools/bundled/shell.js (109)
+ "Extension server error: Object not found: <top>", source: devtools://devtools/bundled/shell.js (8052)
+ "Extension server error: Object not found: <top>", source: devtools://devtools/bundled/shell.js (8052)
+"Uncaught (in promise) #<Object>", source: chrome-extension://devtron/static/index.html (0)
+"Uncaught (in promise) #<Object>", source: chrome-extension://devtron/static/index.html (0)
\ No newline at end of file
diff --git a/documents/업무/4월/3째주/111.zip b/documents/업무/4월/3째주/111.zip
new file mode 100644
index 0000000..3f56101
Binary files /dev/null and b/documents/업무/4월/3째주/111.zip differ
diff --git a/documents/업무/dev/error관리.txt b/documents/업무/dev/error관리.txt
index 544d9a2..5af3d61 100644
--- a/documents/업무/dev/error관리.txt
+++ b/documents/업무/dev/error관리.txt
@@ -1,3 +1,6 @@
+NGRX 참고문서
+  https://itnext.io/3-common-mistakes-when-using-angular-ngrx-firebase-9de4e241d866
+
 에러 내용
   [12864:9072:0408/111520.938:ERROR:crash_report_database_win.cc(469)] failed to stat report
 관련 URL
@@ -15,6 +18,13 @@ form.component ExpressionChangedAfterItHasBeenCheckedError 처리
 "Uncaught (in promise) Error: Could not instantiate: ProductRegistryImpl.Registry", source: devtools://devtools/bundled/shell.js (109)
 
 [15240:0408/113136.402:ERROR:CONSOLE(3256)] "elements are not in the same shadow dom", source: devtools://devtools/bundled/shell.js (3256)
+ "Uncaught (in promise) Error: Could not instantiate: ProductRegistryImpl.Registry", source: devtools://devtools/bundled/shell.js (109)
+ "Uncaught (in promise) Error: Could not instantiate: ProductRegistryImpl.Registry", source: devtools://devtools/bundled/shell.js (109)
+ "Uncaught (in promise) Error: Could not instantiate: ProductRegistryImpl.Registry", source: devtools://devtools/bundled/shell.js (109)
+ "Extension server error: Object not found: <top>", source: devtools://devtools/bundled/shell.js (8052)
+ "Extension server error: Object not found: <top>", source: devtools://devtools/bundled/shell.js (8052)
+"Uncaught (in promise) #<Object>", source: chrome-extension://devtron/static/index.html (0)
+"Uncaught (in promise) #<Object>", source: chrome-extension://devtron/static/index.html (0)
 
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