diff --git a/shared-operations/src/functions/impose.ts b/shared-operations/src/functions/impose.ts
index db863deae..d9462a159 100644
--- a/shared-operations/src/functions/impose.ts
+++ b/shared-operations/src/functions/impose.ts
@@ -2,6 +2,7 @@
 import { PdfFile, RepresentationType } from "../wrappers/PdfFile";
 import { Operator, Progress, oneToOne } from ".";
 
+// @ts-expect-error
 import * as pdfcpuWrapper from "#pdfcpu"; // This is updated by tsconfig.json/paths for the context (browser, node, etc.) this module is used in.
 
 import Joi from "joi";
@@ -140,4 +141,4 @@ export class Impose extends Operator {
             return result;
         })
     }
-}
\ No newline at end of file
+}
diff --git a/shared-operations/src/workflow/validateOperations.ts b/shared-operations/src/workflow/validateOperations.ts
index f01f7a79f..ad322628f 100644
--- a/shared-operations/src/workflow/validateOperations.ts
+++ b/shared-operations/src/workflow/validateOperations.ts
@@ -1,4 +1,4 @@
-import { Operator } from "functions";
+import { Operator } from "../functions";
 import { Action } from "../../declarations/Action";
 import { getOperatorByName } from "./getOperatorByName";
 
@@ -34,8 +34,11 @@ export function validateOperations(actions: Action[]): { valid: boolean, reason?
                         return { valid: false, reason: "There is a wait action that does not have an associated done action." };
                     }
 
-                    for (const afterDoneChild of done[childAction.values.id].actions) {
-                        if(!ioCompatible(operator, getOperatorByName(afterDoneChild.type))) {
+                    for (const afterDoneChild of done[childAction.values.id]?.actions || []) {
+                        const receivingOperator = getOperatorByName(afterDoneChild.type);
+                        if (!receivingOperator) {
+                            return { valid: false, reason: `The receiving operator ${afterDoneChild.type} does not exist.` };
+                        } else if (!ioCompatible(operator, receivingOperator)) {
                             return { valid: false, reason: `Ouput of action ${action.type} is not compatible with input of action ${afterDoneChild.type}` };
                         }
                     }
@@ -44,7 +47,10 @@ export function validateOperations(actions: Action[]): { valid: boolean, reason?
                     return { valid: false, reason: `There shouldn't be a done action here.` };
                 }
                 else {
-                    if(!ioCompatible(operator, getOperatorByName(childAction.type))) {
+                    const receivingOperator = getOperatorByName(childAction.type);
+                    if (!receivingOperator) {
+                        return { valid: false, reason: `The receiving operator ${childAction.type} does not exist.` };
+                    } else if (!ioCompatible(operator, receivingOperator)) {
                         return { valid: false, reason: `Ouput of action ${action.type} is not compatible with input of action ${childAction.type}` };
                     }
                 }
@@ -60,8 +66,8 @@ export function validateOperations(actions: Action[]): { valid: boolean, reason?
     return { valid: true };
 }
 
-function ioCompatible(outputingOperator: typeof Operator, recievingOperator: typeof Operator): boolean {
+function ioCompatible(outputingOperator: typeof Operator, receivingOperator: typeof Operator): boolean {
     const outputType = outputingOperator.schema.describe().keys.output.label;
-    const inputType = recievingOperator.schema.describe().keys.input.label;
+    const inputType = receivingOperator.schema.describe().keys.input.label;
     return outputType == inputType;
-}
\ No newline at end of file
+}
diff --git a/shared-operations/src/wrappers/PdfFileJoi.ts b/shared-operations/src/wrappers/PdfFileJoi.ts
index 83cbf5f6d..427ba2228 100644
--- a/shared-operations/src/wrappers/PdfFileJoi.ts
+++ b/shared-operations/src/wrappers/PdfFileJoi.ts
@@ -23,5 +23,5 @@ export const JoiPDFFileSchema = Joi.custom((value: Express.Multer.File[] /* <- a
 }, "pdffile validation");
 
 function isPdfFileArray(value: any): value is PdfFile[] {
-    return value.every((e) => e instanceof PdfFile)
-} 
\ No newline at end of file
+    return value.every((e: PdfFile) => e instanceof PdfFile)
+}